Global Patent Index - EP 1865083 A4

EP 1865083 A4 20090225 - HIGH STRENGTH HOT ROLLED STEEL SHEET EXCELLENT IN BORE EXPANDING WORKABILITY AND METHOD FOR PRODUCTION THEREOF

Title (en)

HIGH STRENGTH HOT ROLLED STEEL SHEET EXCELLENT IN BORE EXPANDING WORKABILITY AND METHOD FOR PRODUCTION THEREOF

Title (de)

HOCHFESTES HEISSGEWALZTES STAHLBLECH MIT HERVORRAGENDER AUSDEHNUNGSFÄHIGKEIT IN BOHRLÖCHERN UND HERSTELLUNGSVERFAHREN DAFÜR

Title (fr)

ACIER LAMINE A CHAUD AYANT UNE TRES HAUTE RESISTANCE ET UNE EXCELLENTE APTITUDE A LA DILATATION AU FORAGE

Publication

EP 1865083 A4 20090225 (EN)

Application

EP 06729667 A 20060322

Priority

  • JP 2006305700 W 20060322
  • JP 2005092610 A 20050328
  • JP 2005092611 A 20050328

Abstract (en)

[origin: EP1865083A1] A high-strength hot-rolled steel sheet containing C: 0.05 to 0.15%, Si: no more than 1.50% (excluding 0%), Mn: 0.5 to 2.5%, P: no more than 0.035% (excluding 0%), S: no more than 0.01% (including 0%), Al: 0.02 to 0.15%, and Ti: 0.05 to 0.2%, which is characterized in that its metallographic structure is composed of 60 to 95 vol% of bainite and solid solution-hardened or precipitation-hardened ferrite (or ferrite and martensite) and its fracture appearance transition temperature (vTrs) is no higher than 0°C as obtained by impact tests. (% in terms of % by weight)

IPC 8 full level

C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01); C22C 38/58 (2006.01)

CPC (source: EP KR US)

C21D 8/0226 (2013.01 - KR); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP US); C22C 38/14 (2013.01 - KR); C22C 38/44 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP KR US); C21D 2211/005 (2013.01 - EP KR US)

Citation (search report)

  • [X] US 6364968 B1 20020402 - YASUHARA EIKO [JP], et al
  • [A] JP 2000087143 A 20000328 - NIPPON KOKAN KK
  • [X] EP 1195447 A1 20020410 - KAWASAKI STEEL CO [JP]
  • [A] EP 1201780 A1 20020502 - NIPPON STEEL CORP [JP]
  • [A] SLAVOV ET AL: "Impact of Coil Cooling Rate on Texture, Special Boundaries and Properties of Hot Rolled Strip", MATERIALS SCIENCE FORUM, AEDERMANNSFDORF, CH, vol. 467/470, no. Part 1, 1 January 2004 (2004-01-01), pages 323 - 328, XP009110567, ISSN: 0255-5476
  • See references of WO 2006103991A1

Designated contracting state (EPC)

AT DE FR GB

DOCDB simple family (publication)

EP 1865083 A1 20071212; EP 1865083 A4 20090225; EP 1865083 B1 20110817; CN 101906567 A 20101208; CN 101906567 B 20140702; EP 2351867 A1 20110803; KR 100942087 B1 20100212; KR 100942088 B1 20100212; KR 20070107167 A 20071106; KR 20090050105 A 20090519; US 2009050243 A1 20090226; US 2011297281 A1 20111208; US 8038809 B2 20111018; US 8486205 B2 20130716; WO 2006103991 A1 20061005

DOCDB simple family (application)

EP 06729667 A 20060322; CN 201010271326 A 20060322; EP 11160725 A 20060322; JP 2006305700 W 20060322; KR 20077022030 A 20060322; KR 20097006940 A 20060322; US 201113210807 A 20110816; US 90842306 A 20060322